In order of impact: switch to a wired Ethernet connection (WiFi is the single biggest source of extra latency, easily 20–50ms); close background downloads and updates; enable QoS on your router to prioritise gaming traffic; and make sure you're actually connecting to an Australia/Oceania game server, not one overseas. High ping to Asian or US servers is mostly distance-based and not something a local fix can solve.

按影响力排序：换成有线以太网(WiFi是延迟的头号来源，轻松多出20-50ms)；关掉后台下载和更新；路由器开启QoS给游戏流量优先级；确认自己连的是澳洲/大洋洲服务器而不是海外服务器。连亚洲或美国服务器延迟高主要是物理距离问题，本地怎么调都解决不了。